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Efficient autotrophic denitrification method of bacterial filter

A biological filter, autotrophic denitrification technology, applied in the direction of aerobic and anaerobic process treatment, can solve the problem of small denitrification load, and achieve the effect of strong interception capacity

Active Publication Date: 2013-07-10
BEIJING UNIV OF TECH
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Problems solved by technology

At present, there are bottlenecks such as low denitrification load in the whole process of biofilter autotrophic denitrification process, so how to improve the treatment efficiency of the reactor has practical significance

Method used

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  • Efficient autotrophic denitrification method of bacterial filter
  • Efficient autotrophic denitrification method of bacterial filter
  • Efficient autotrophic denitrification method of bacterial filter

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Embodiment

[0014] The reactor of the present invention is made of organic glass columns, with an inner diameter of 250mm, a filling height of 1300mm, a 20mm river pebble supporting layer at the bottom, a disc membrane aeration device, and a total volume of 40L in the reaction zone. In this experiment, volcanic rock is selected as the filter material, with an average porosity of 80% inside and outside, a particle size ranging from 4.0 to 6.0 mm, and an apparent density of 1.60-1.80 kg / m 3 , Bulk density 0.7-0.9kg / m 3 . The filling height of the filter material is 900mm, the filling rate of the filler is 100%, and the initial effective volume is 21L. The reactor adopts an up-flow water inlet method, raw water and aeration enter from the bottom, and the outlet water flows out from the upper water outlet. During the test, the temperature of the reactor was controlled by the heating of the water bath wrapped in the sleeve outside the reaction zone, and the aeration volume was controlled by the...

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Abstract

An efficient autotrophic denitrification method of a bacterial filter belongs to the wastewater autotrophic nitrogen removal field. The efficient autotrophic denitrification method comprises the steps of: inoculating a CANON process biological membrane and successfully activating the autotrophic nitrogen removal bacterial filter in an anaerobic-first and aerobiotic-later activation manner; and after the reactor is successfully activated, increasing the gas-water ratio of the reactor, namely the ratio of aeration rate to water inlet flow, by controlling the water inlet flow and the aeration rate, thereby continuously improving the removal load of the reactor. When the ammonia nitrogen removal rate of the reactor is greater than 99%, the water inlet flow is increased; when the concentration of nitrite nitrogen in yielding water is less than 30 mg / L, the aeration rate is increased; and finally, the total nitrogen removal rate of the reactor reaches 80-89% and the total nitrogen removal load reaches 1.0-3.11 kgN.m<-3>.d<-1>, and therefore, efficient autotrophic nitrogen removal is realized. The efficient autotrophic denitrification method provided by the invention solves the problem of low treatment load of the full autotrophic nitrogen removal reactor; and an efficient implementing method is provided for full autotrophic nitrogen removal of the bacterial filter.

Description

Technical field [0001] The invention belongs to the field of wastewater autotrophic denitrification. Specifically, it relates to the efficient operation method of the whole autotrophic denitrification process of the biological filter. Background technique [0002] In recent years, with the rapid growth of my country’s economy, the continuous advancement of industrialization and urbanization, water pollution has increased, causing water quality shortages and original resource water shortages to overlap each other, which increasingly affects people’s normal production And life. Among them, nitrogen pollution is the main hazard. However, the traditional nitrification / denitrification biological denitrification process not only suffers from congenital deficiencies such as long process flow, high oxygen supply, the need for additional carbon sources, and high sludge production. Therefore, scholars from various countries have carried out research on various new biological nitrogen rem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 李冬梁瑜海畅晓燕张肖静崔少明杨卓张翠丹吴青苏庆岭范丹张玉龙周元正门绚杨胤何永平曾辉平张杰
Owner BEIJING UNIV OF TECH
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